DataVXACS Applied Energy MaterialsPaper
journal article·2020-09-28Open access

Nano-Ceramic Cathodes via Co-sputtering of Gd–Ce Alloy and Lanthanum Strontium Cobaltite for Low-Temperature Thin-Film Solid Oxide Fuel Cells

Haowen Ren, Yoon Ho Lee, Erik A. Wu, Hyeseung Chung, Ying Shirley Meng, Eric E. Fullerton, Nguyen Q. Minh

ACS Applied Energy Materials· Volume 3· Issue 9
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Source abstract

Abstract

We report the electrochemical performance and structural characteristics of porous nanostructured ceramic cathodes for thin-film solid oxide fuel cells (TF-SOFCs) based on yttria-stabilized zirconia (YSZ) electrolytes. The nanostructured cathode is obtained through magnetron co-sputtering of gadolinium–cerium (Gd–Ce) alloy and lanthanum strontium cobaltite perovskite targets. The resultant nanostructure and composition of the ceramic cathode are controlled by adjusting the co-sputtering conditions. The peak power densities in our fabricated TF-SOFCs are the highest reported values for YSZ-based electrolyte SOFCs, showing 0.14, 0.48, 1.21, 2.56, and 3.01 W/cm2 at 450, 500, 550, 600, and 650 °C, respectively, operating under air and pure hydrogen fuel. The results show that the porosity and composition of the cathode greatly affect the resulting peak power densities. This work illustrates the capability of sputtering to produce stable, scalable, nano-ceramic cathodes with superb peak power densities when integrated in TF-SOFCs.
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Research context

Energy storageMetals & alloysCeramics & glassesNanomaterialsElectronic materials

OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Electronic and Structural Properties of Oxides · Catalysis and Oxidation Reactions

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Materials Science and Engineering, University of California, San Diego, La Jolla, California 92093, United States

Center for Memory and Recording Research, University of California, San Diego, La Jolla, California 92093, United States

Center for Energy Research, University of California, San Diego, La Jolla, California 92093, United States

School of Mechanical Engineering, University of Ulsan, Ulsan 44610, Republic of Korea

Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States

Sustainable Power and Energy Center (SPEC), University of California, San Diego, La Jolla, California 92093, United States

Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093, United States

Funding

U.S. Department of Energy · National Science Foundation

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